Steps for Windows, Linux and MacOS
Step 1
If Citra is already running, restart it first.
Navigate to Emulation → Configure (Citra → Preferences on Mac) and in the Debug tab, click on Open Log Location.
Make sure the Global Log Filter is set to *:Info before continuing to Step 2.
Step 2
Run the game you are having issues with until it reaches the point where it crashes or encounters the bug. Exit out of Citra.
Step 3
In the window that you opened in Step 1, the log will be in citra_log.txt. Do not relaunch Citra or else the citra_log.txt file will be overwritten. Upload (drag & drop) this file to your support post as a file attachment.
If you accidentally relaunched Citra, upload the citra_log.txt.old.txt file instead.
What to do if your copy of Citra cannot boot:
Step 1
Navigate to your appdata folder.
For Windows users: Paste %appdata%/Citra/log into your explorer address bar, and it should take you there.
For Linux/Mac users: In the terminal, type echo $XDG_DATA_HOME . This command will print out the user-specific data directory. If nothing gets printed out, that means the directory hasn’t been changed and the log is present in ~/.local/share/citra-emu/log . If something has been printed out, however, you should follow that directory instead and manually navigate to /citra-emu/log there.
Step 2
In appdata/roaming/citra/log, look for the file labeled ‘citra_log.txt’.
Step 3
Upload that file, just like step 3 on the other set of directions.
Steps for Android
Step 1
If the Citra app is already open, restart it first.
Run the game you are having issues with until it reaches the point where it crashes or encounters the bug. Now close the Citra app. Do not start the Citra app again until after you have completed this guide.
Step 2
Navigate to Internal Storage/citra-emu/log and look for the file called citra_log.txt:
Step 3
Upload this file to your support post (either in the Citra discord server or on the Citra Forums)